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The missing or altered X chromosome of Turner syndrome causes errors during fetal development and other developmental problems after birth â short stature, ovarian failure and learning disabilities. Physical characteristics and health complications that arise from the chromosomal error vary greatly.
See also: Turner Syndrome written for patients. Turner syndrome can be defined as loss or abnormality of the second X chromosome in at least one cell line in a phenotypic female. In the majority of affected girls, the normal X chromosome is maternal in origin. Obvious physical stigmata such as neck webbing affect only approximately 20% of girls with Turner syndrome.